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When two entities can reference each other and each can contain multiple instances of the other, such a relationship is referred to as many-to-many. An example of such a relationship is a Book can contain several Authors while a given Author can write several Books. These type of relationships are modeled using an associative tables in databases.
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What is one to many relationship in database er diagram?
A one-to-many relationship means that one row in one of the tables will relate directly to many rows in the other table.
What is relationship in er diagram?
In Database Analysis and Design; the relationship in an ERD can only be mandatory or optional between two entities. Mandatory is where both entities must be present, whereas with optional, you don't always need two entities.
How do you convert an ER diagram into a Relational Schema?
secret...know it yourself
What is a polygon with 9 angles?
a nonagon (non-er-gone) this website is really good for that sort of thing: .math.com/tables/geometry/polygons.htm
Which sentence makes more sense in this sentence you are more smarter or smart?
"You are smarter" is the correct form ("smarter" is the conventional way of saying "more smart"). This -er rule works for many other words:More tall --> "You are taller than her"More thin --> "You look thinner than you did a week ago"More smart --> "She is smarter than him"
What is significance of ER diagram?
This will depend on what you mean by ER diagram. This could be an entity relationship diagram that shows how to maximize your business intelligence.
Er diagram for hospital management system?
An ER diagram is an entity-relationship diagram they show individuals and their links to each other. An ER diagram for a hospital management system would be a flow chart showing hospital staff, equipment, patients, records and more.
What are the benefits of using ER diagrams?
ER diagrame shows the relationship among entities.
ER diagram for a banking system?
entity relationship diagram on banking system?
Where can one find tools for an ER diagram?
There are many places one can find tools for an ER diagram. ER stands for Entity-Relationship. These tools can be found at sites such as Case Studio, Edraws Soft, and Smartdraw.
How do you convert an entity relationship diagram to a table?
converting er diagram to table in dbms?
What isn the Er diagram of library management?
i need a entity relationship diagram of a small library
What is one to many relationship in database er diagram?
A one-to-many relationship means that one row in one of the tables will relate directly to many rows in the other table.
What is the significance of the diagram?
This will depend on what you mean by ER diagram. This could be an entity relationship diagram that shows how to maximize your business intelligence.
What is entity relationship diagram for travel agency?
er travel agent؟
Entity relationship model with example?
draw an er diagram on attendance management system
What is cardinality ratio in ER diagram?
It specify the number of relationship instances that an entity can participate in.
